Rotary cutting, mixing, and attrition mill



June 17, 1930. R. c. HOPKINS ROTARY CUTTING, MIXING, AND ATTRITION MILL Filed March 12, 1928 #M ,ww

Patented June 17, 1930 P'ATEN'F OFFICE ROBERT C. HOPKINS,

on ALLIANCE, OHIO ROTARY CUTTING, MIXING, AND ATTRITION MILL Application filed March 12, 1928. Serial No. 260,863.

The invention relates to mills for pulverizing, breaking up, mixing and screening the heavy particles of oils, paints, pigments and other mineral, vegetable and animal matter in fluid state or which will flow and capable of being ground and mixed with water, oils or other liquids.

The object of the improvement is to provide an apparatus which will cut, grind and 1.0 mix the heavy particles of the oil or other substance to such an extent that it is thoroughly mixed of the same consistency and' in condition to flow freely through pipe lines,

valves and other parts such as included in circulating system to an oil burner or the Fuel oil, such as is used for oil burners and the like, comprises a considerable portion of sludge or heavy particles which will not freely fiow through the circulating system and frequently clog the same, causing trouble and inconvenience.

The application of heat assists to some extent in dissolving these heavy portions of the oil and it is commonpracticeto-screen the oil, removing these heavy portions before the same passes to the burner.

The present invention contemplates the provision of mechanical means for entirely breaking up and pulverizing all of the heavy portions .of the oil or other substance. to such an extent that the oil may freely pass through the circulating system and be burned in the burners. i

.The objects of the invention may be attained by providing a housing within which is located a plurality of rotary saws or per forated disks spaced by means of disks of less diameter than the saws, the housing having ribs provided with cutting edges for cooperation with the saws.

The action of the improved mill is the cutting, grinding and mixing by friction caused by the rotating parts, which is increased by saw teeth, or perforations, formed on or within 'the disks, or both.

An embodiment of the invention is illustrated in the accompanying drawing, in 50 which Figure 1 is a transverse vertical sectional view of the improved oil mill; and

Fig. 2, a longitudinal sectional view taken upon the line 2 -2, Fig. 1.

Similar numerals refer to similar parts throughout the drawing.

The mill includes a housing 1 preferably located in horizontal position and of greater lE eight than its width, as best illustrated in aps 2 and 3 are connected to the opposite ends of this housing as by the cap screws 4 located through the flanges'5 of the capsandr into the flange portions 6 of the housing, gaskets 7 being preferably located in the joints to prevent leakage of the oil therethrough. W V

A bearing 8 may be formed in the cap 2 within which may be journaled one end of the shaft 8 and a bearing 9 is formed in the 770 cap 3 through whichis 10111113186. the other end portion of the shaft, a stufiing box 10 being preferably associated with the bearing 9' for providing an oil-tight joint.

A plurality of disks 11 is mounted upon the shaft 8, the disks being spaced by means of disks 12 of substantially the same thick ness as the disks 11 and preferably of a diameter less than the disks 11. v

A collar 13 is fixed upon the shaft,-near one end thereof and a heavy disk 14 abuts the collar, the alternate disks 11 and spacin disks 12 being held between said heavy dis 14s and a similar disk 14; by means of the clamping nut 15 upon the shaft.

Each disk 11 may be provided with cut-out portions such as the saw teeth 11" around its periphery, or the perforations'll near its periphery, or with both as illustrated in the accompanying drawing; or if desired the saw teeth may be upon the spacing disks 12 and the disks 11 may be perforate. or imperforate. a 4

A pulley or the likemay be fixed upon the protruding outer endof the shaft 8* for operatively connecting the same to. a motor or other suitable source of power whereby the shaft may be rotated in the direction of the arrow in Fig. 1 at a high rate of speed.

The lower portion of the housing 1s dlvided in op osite sides of this lower 3 the direction indicated in the charge from the housing.

The upper end of the partition wall 16 is provided with the arcuate T-head 20, for 1 contact with the circular saw blades 11, and

two-ribs 21, one at the inlet side of the mill, and the other at the outlet side, are formed,

upon the inside of the housing. These ribs are machined to a close fit with the teeth of the saw blades. I h

' The upper .portion of the housing is divided into two attrition chambers 24 and 25, by means of-the depending partition wall 26 having the-lower cutting edge 27 for perlpho eral engagement with the disks 11.

In the operation of the mill, oil or other substance is fed to the inlet chamber 17 and passes upward between the adjacent rib 21 andthe disks, the heavy particles thereof being broken up, pulverized, mixed and screened.

It will be seen that room is provided at the top of the casing; to allow the flow of oil or the like to slow down to a speed at which it is- 30 ground or milled by .attrition within the chamber 24, after which it passes'beneath the cutting edge 27 to the chamber 25.

The material then passes .down between the other'rib 21 and the disks, into the outlet chamber 18 from which it is discharged through the pipe connected thereto.

' By revolving the. disks at 'hi h speed, in rawmg, the action of the mill assists the usual pump in the circulating line, by supplying a momentum by the cutting" action and attritionof the disks.

By; separating the disks 11, by means of the disks 12,'it will be seen that oil can be pumped through the mill while running or I while at rest.

This mill may be located on either the suction or pressure side of a circulatin pump and it should be understood that it 0 will be broken up, thus providing a free flow of the oil' through the circulating system and permitting all of the oil to be burned as fuel. I It will beobvious that there will be a dissolving action of the heavy particles of oil or.

other substance due to the generation of heat tact with the named disks.

oes not] replace the pump but aids the work of pumpresulting from the breaking and cutting up of the oil articles.

' It ,will a so be seen that since all of the workin parts of the mill are entirely surrounde by the oil being milled, there will be an automatic lubrication of all such parts. v

I claim: L-A rotary mill including a housing, a lurality, of revolving diskswithin the .housmg, cutting edges upon the interior of the housing in close contact with the peripheral portions'of the disks, and means for passing oil and the like through the housing between the disks and said cuttm edges.

2. A rotary mill inc uding a housing, a plurality of revolving disks within the housmg, cutting edges upon the interior of the housing in close contact with the disks, and

means for passing oil and the like thro'ugh the housing between the disks and said cutting edges, the housing being enlarged between said cuttin edges whereby the oil flow is slowed up, pro ucingan attrition and mixing of the oil.

3. A rotar mill including a housing, a revolving sha within the housing, a lurality of disks upon said shaft, spacin disks located between said first named lsks, and cutting edges upon the interior of the-housg in close contact with the peripheral portions of said disks.

4. A rotary mill including ahoilsing, a.

revolving shaft within the housin a plurality of disks upon said shaft, spacing disks of less diameter than the first named disks, located between said disks, and cutting edges upon the interior of the housing in close conperipheral portions of said first '5. 'A rotary mill including a housing. a plurality of revolving disks within the housmg, cutting edges upon opposite sides of the interior of the housm in close contact with the disks, a partition ividing the portion of the casing beneath the disks into two coinpartments and means for admitting oiland the like to one of said compartments and discharging the oil from the other com artment after it has between the isks and said cutting e, gess- 6. 'A rotary mill including 'a housing, a plurality of revolving disks within the housing, cut-out brtions the J disks, cutting edges upon t e interior of the housmg in close contact with the fperipheral portions of the disks, and means or passing oil and the like between the disks and said cutting edges.

7. A rotary mill including a housing, a plurality of revolving disks within the housmg, 'saw teethon the disks, cutting edges upon the interior of the housing in close contact with the peripheral portions of the disks, and means for passing oil and the like between the disks and said cutting edges.

8. A rotary mill including a housing, a

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plurality of revolving disks within the housing, perforations in the disks, cutting edges upon the interior ofthe housing in close contact with the peripheral portions ofthe disks, 5 and means for passing oil and the like between the disks and said cutting edges. 9. A rotary mill including a housing, a plurality of revolving disks within the housing, a plurality of cutting edges upon the m interior of the housing in close contact with the peripheral portions of the disks, corre-' sponding attrition chambers within the housing, and means for passing oil and the like between the disks and cutting edges and through said chambers.

10. A rotary mill including a housing, partition walls dividing the housing into a. plurality of chambers and provided with cutting edges, a rotary cutter within the housing in close running contact with the cutting edges, and means for passing oil and the like through the rotary cutter and over the cutting edges, progressively through said chambers, the rotation and attrition of the cutters imparting a whirling motion to the oil in the chambers causing the heavy particles of the oil to flow toward. the rotary cutter b the centrifugal force set up in the cham ers.

so In testimony that I claim the above, I have hereunto subscribed my name.

ROBERT C. HOPKINS. 

